JPH0224Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a rice transplanter that can maintain a constant planting depth regardless of pitching of the vehicle body, etc., and regardless of changes in mud hardness in the field to be planted. For details regarding the planting equipment lifting/lowering operation device, please refer to the float.
The seedling planting device is attached to the seedling planting device so that it can move up and down and is biased downward, and the seedling planting device is automatically attached to the vehicle body so that the vertical position of the float relative to the seedling planting device is maintained within a set range. A control mechanism for raising and lowering the float is provided, and an elastic member for biasing the float downward,
This invention relates to a device that is interlocked and connected so that the increasing biasing force can be changed as the mud hardness detection piece that is biased into the mud is swung due to the increase in mud hardness.

When storing a rice transplanter in a warehouse or loading it onto a truck for transportation, the seedling planting device is lowered until the float makes contact with the ground or loading platform, making effective use of the float. Although this stabilizes the posture of the seedling planting device, there is a risk that the mud hardness detection piece or its mounting member may be deformed or damaged as the seedling planting device descends. To elaborate further,
When the mud hardness detection piece comes into contact with the ground or the surface of the loading platform as the seedling planting device descends, it will swing backward and retreat upwards. Due to the accompanying frictional resistance, it is difficult to swing backward smoothly, resulting in the disadvantage of causing the deformation damage described above.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to prevent deformation and damage of the mud hardness detection piece or its mounting member by a simple modification that makes effective use of the original structure. The point is to avoid the situation without requiring any operation.

The present invention provides a raising/lowering operating device for a seedling planting device of the rice transplanter described above, wherein the mud hardness detection piece is placed in a detection action position in which it protrudes below the bottom surface of the float, and in a non-detection action position in which it is retracted above the bottom surface of the float. a mechanism that supports the transmission clutch for driving on and off of the seedling planting device in a state where it is supported in the detection action position when the transmission clutch is in the engaged state;
Further, it is characterized in that it is interlocked and connected so that when it is in the off state, it is automatically switched to the state where it is supported in the non-detection action position.

Next, the effects of the feature configuration of the present invention will be described.

In other words, the mud hardness detection piece is switched to a non-detecting position where it is retracted above the bottom of the float as necessary to avoid the above-mentioned deformation damage caused by the descent of the seedling planting device. be. In particular, according to the present invention, although the power transmission clutch for connecting and disconnecting the drive of the seedling planting device is engaged when lowering the seedling planting device during seedling planting work,
We focused on the fact that the seedling planting device is cut when lowered when it is stored in a warehouse or loaded on a truck, and we took advantage of this fact to set the mud hardness detection piece in the detection active position and in the non-detection position. The mechanism that supports switching between the detection action position and the detection action position is linked to the on/off operation of the transmission clutch for driving on and off of the seedling planting device, so that when it is in the engaged state, it is supported in the detection action position, and when it is in the off state, it is in the non-supporting state. Since the mud hardness detection piece support mechanism is automatically switched to the state where it is supported at the detection action position, the desired purpose can be achieved without requiring any special operation on the mud hardness detection piece support mechanism.

As a result, we have achieved a device for lifting and lowering the seedling planting device of a rice transplanter that can be used more favorably over a long period of time.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, at the rear of the vehicle body, which is equipped with left and right front wheels 1, 1, left and right rear wheels 2, 2, an engine 3, a driver's seat 4, etc., there is a slanted seedling stand 5 that is reciprocated horizontally with a constant stroke; Five planting claws 6 are provided for picking out seedlings one by one and planting them in the field while circulating up and down along the lower end row of pine-shaped seedlings placed on the seedling platform 5. A seedling planting device 7 is provided to sequentially plant seedlings as the aircraft advances.

The seedling planting device 7 is connected to the vehicle body via a quadruple link mechanism 8 so as to be movable up and down in a parallel position, and a hydraulic cylinder 9 is provided for raising and lowering the link mechanism 8 with respect to the vehicle body, Also,
The seedling planting device 7 is configured to be able to be raised and lowered relative to the vehicle body by extending and contracting the hydraulic cylinder 9.

As shown in FIGS. 2 and 3, the rear ends of the three floats 10 that level the field for seedling planting are pivotably supported around the horizontal axis X relative to the seedling planting device 7. The front end of the float is interlocked and connected to the seedling planting device 7 via a bendable link mechanism 11, and the link mechanism 11 for the central float 10 of each of the floats 10 is biased toward extension. A spring 12 is provided to elastically bias the central float 10 downward, and a swing operating arm 1 of a control valve 13 is provided to switch the operating state of the hydraulic cylinder 9.
4 and the link mechanism 1 for the central float 10
1 are interlocked and connected by a wire 15, and when the swing position of the float 10 relative to the seedling planting device is within the appropriate range, the control valve 13 is brought into the lifting stop state where the operation of the hydraulic cylinder 9 is stopped. When the upward movement is out of the proper range, the control valve 13 is activated to extend the hydraulic cylinder 9 to raise the seedling planting device 7. When the downward movement is out of the proper range, the control valve 13 is activated to extend the hydraulic cylinder 9 to raise the seedling planting device 7. By shortening the cylinder 9, the seedling planting device 7 can be automatically switched to a lowering state, thereby automatically maintaining the swinging position of the float 10 relative to the seedling planting device within a set range. The structure is such that the planting depth can be made constant.

In short, the seedling planting device 7 is automatically moved up and down while the height of the seedling planting device relative to the mud is detected based on the vertical movement of the float 10, thereby stabilizing the planting depth. .

As shown in FIG. 2, the locking arm 16 that locks and moves the spool 13A of the control valve 13, which is biased toward the lowering operation by the float 10 toward the lowering operation, is of a back-and-forth swing type. The manual lift lever 17 is provided so as to be swingable.
The device is configured so that the seedling planting device 7 can be manually raised and lowered by switching to the raised position U, the raised and lowered stop position N, and the lowered position D, and the raised and lowered lever 17 is operated to the automatic position A. Then, as described above, the control valve 13 is configured to be automatically switched by the float 10. or,
Although not illustrated, a spring ball for locking and holding the lifting lever 17 at the lifting stop position N is provided so as to act on the locking arm 16.

An engaging type transmission clutch 18 for intermittent driving of the seedling planting device 7 is connected to the transmission case 1 on the side of the vehicle body.
9, a swinging type clutch operation arm 20 is installed in a biased state, and is attached to the lift lever 17.
Then, when it is in the range ahead of the midway position M between the lowered position D and the automatic position A ahead of it, the input operation position is ON, and it is in the range behind the midway position M. They are interlocked and connected via a link mechanism 21 and a spring 22 for interlocking flexibility so that the switch operation position is switched to OFF when the switch is turned on.

In short, during seedling planting work, the lift lever 17 is operated to the automatic position A to lower the seedling planting device 7 close to the ground, and the transmission clutch 18 is engaged and operated to move the lift lever 17 to the lower position D or the like. When operating the seedling planting device 7 to the raised position U to arbitrarily raise or lower it, the transmission clutch 18 is disengaged.

In addition, the mud hardness detection piece 23 is placed on the float 10 with respect to the support arm 24 fixed to the seedling planting device 7.
The spring 23 is designed to oscillate as the hardness of the mud increases when the spring 23 is plunged into the mud at a point directly in front of the mud.
The mud hardness detection piece 23 is pivoted in a state where it is biased toward the entry side at point a, and the biasing force of the piece 23 is pivoted backward relative to one end of the float downward biasing spring 12. They are connected in an interlocking manner via a release wire 25 so that the force can be changed to increase, and the downward biasing force of the float 10 can be automatically changed to a force corresponding to the hardness of the mud. There is.

As shown in FIGS. 4 and 5, the mud hardness detection piece 23 is composed of a piece 23a with a circular cross-sectional shape, and a triangular piece 23 with a narrower end.
b, a triangular shape 23c whose rear end is relatively narrow and a horizontally long rectangular shape 23d are provided, and these 23a are connected to the swinging support piece 23A with bolts so that they can be replaced. In addition, when the mud is softer, the width is larger and the mud is difficult to escape to the side by installing a member, so that it can be adapted to a wide range of hardness of mud.

To configure the support arm 24 of the mud hardness detection piece 23, the distal end portion 24A is connected to the proximal end portion 24.
A spring 26 is provided which is pivotally supported to be able to swing up and down and biases the tip end portion 24A downward, and a stopper 27 which abuts and restricts the swing range of the tip end portion 24A is provided. Then, when the tip end portion 24A is swung downward, the mud hardness detection piece 23 is placed in a first support state in which it is supported at a detection action position protruding below the bottom surface of the float 10.
Further, when the tip end portion 24A is swung upward, a second support state is established in which the mud hardness detection piece 23 is supported in a non-detecting position where it is retracted above the bottom surface of the float. Then, when the tip end portion 24A is operated with respect to the lift lever 17 to the automatic position A, the tip end portion 24A is operated to the first support state, and also to the lowering position D, the lifting stop position N, and the raising position U. The seedling planting device 7 is connected to the ground via the release wire 28 and the linking and accommodating spring 29 so that the seedling planting device 7 is automatically switched to the second support state when the seedling is planted. When lowering the seedling planting device 7 close to the ground, the mud hardness detection piece 23 should be located at the detection action position, and when lowering the seedling planting device 7 close to the ground when storing it in a warehouse, etc. The detection piece 23 is positioned at a non-detecting position.

In carrying out the present invention, the position of the mud hardness detection piece 23 can be changed in various ways, such as being placed on the side of the float 10, for example.

Further, the specific configuration of the elevation control mechanism can be modified in various ways, such as by electrically detecting the vertical movement position of the float 10 and electromagnetically operating the control valve 13.

Further, to configure the support mechanism for the mud hardness detection piece 23, in addition to providing the arm 24A that swings up and down as described in the embodiment, a four-link mechanism that supports the mud hardness detection piece 23 so as to be able to move up and down in parallel is provided. Various changes are possible, such as providing a .

In addition, in the embodiment, the transmission clutch 18 for driving and disconnecting the drive of the seedling planting device is operated on and off by the lifting lever 17, but the transmission clutch 18 may be operated on and off using a dedicated operating tool. It may be provided.

[Brief explanation of drawings]

Fig. 1 is a side view of the riding rice transplanter, Fig. 2 is a schematic diagram of the lifting/lowering operation device of the seedling planting device, Fig. 3 is a schematic plan view of the seedling planting device, and Fig. 4 is the same as in Fig. 2.
Line sectional views and FIGS. 5A, 5B, and 5C are cross-sectional views of mud hardness detection pieces having different shapes. 7...Seedling planting device, 10...Float, 12...
...Elastic device for downward biasing, 18...Transmission clutch, 2
3...Mud hardness detection piece, 24A...Mud hardness detection piece support mechanism.

Claims (1)

[Scope of utility model registration request] The float 10 is attached to the seedling planting device 7 so as to be movable up and down and biased downward, and the float 10 is automatically attached to the seedling planting device 7 so as to maintain the vertical position of the float 10 relative to the seedling planting device within a set range. A control mechanism is provided to raise and lower the seedling planting device 7 with respect to the vehicle body, and the elastic device 12 for biasing the float 10 downward detects the mud hardness of the mud hardness detection piece 23 pushed into the mud. A raising/lowering operating device for a seedling planting device of a rice transplanter which is interlocked and connected so that the biasing force is changed to increase as the rocking force increases, and the mud hardness detection piece 23 is positioned below the bottom surface of the float. A mechanism 24A that supports the mechanism so as to be switchable between a detection action position protruding from the bottom surface of the float and a non-detection action position retiring above the bottom surface of the float.
When the transmission clutch 18 for driving on/off of the seedling planting device 7 is turned on, it is supported at the detection action position, and when it is turned off, it is supported at the non-detection action position. 1. A lifting and lowering operating device for a seedling planting device of a rice transplanter, characterized in that the device is interlocked and connected so that the switching operation is automatically performed.